I have a 6 yr old 17.1 hh OTTB gelding. I have had him for almost a year and am planning on training him for jumpers. He collects himself well for the most part but he is still really forward and does not regulate his speed especially at the canter. He tends to throw his head down and speed up. It seems he is just off balance because I canter and trot him in circles and especially going clock-wise he drops his inside shoulder and falls in and speeds up. He will come back down after he regains his balance. He has taken off once and that didn't end well for either of us. Anyway the bit I am using now is a western tom thumb with a copper roller over the one break. I know this bit is a controversial bit but it was a trial to see what he would do... he loves it! I am just looking to find one that would do the trick but obviously an english style bit. I have tried him in a full cheek snaffle.... that is when he took off out of control and locked his jaw and neck. I also have put him in a mullen mouth pelham and a straight bar pelham which he seemed to respond to somewhat but was not as relaxed as in the tom thumb. When I bought him his previous owner was using a waterford because he took off with him at the canter as well but he never ended up cantering him after that anyway. I have used the waterford on him as well but I'm not sure if that is going to help either of us but I'm not sure about that purpose of that bit. He seems to not like a straight mouth piece but also not a single joint. I was thinking a french link pelham or even a kimberwick with a french link. I have seen a boucher??? If that's how you spell it but I'm not sure what they are for. I don't know if I want to put him in something like a D-ring I want to have the extra stop if needed.
Also any tips for training an OTTB and helping with balance and regulating speed would be great. :) thanks